| 摘要 |
Discrimination of the type of a recording medium with high accuracy is obtained by using the intensity of a specular reflection light from the recording medium and a feature of the recording medium surface derived from an image of the recording medium surface as discrimination parameters. In particular, the accuracy in discrimination between plain paper and ink-jet coated paper and between photographic glossy paper and a glossy film is improved. Also, the type of the recording medium is discriminated based on a detected value of the intensity of the specular reflection light from the recording medium and a parameter representing surface conditions of the recording medium which is derived from an image information made up of a plurality of pixels corresponding to a predetermined area of the recording medium surface.
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